Identification of Critical Values Based on Natural Ester Oils as Potential Insulating Liquid for High Voltage Power Transformers

Year 2017, , 869 - 877, 20.12.2017

Nihat Pamuk

https://doi.org/10.2339/politeknik.369050

Cited By: 3

Abstract

This study tries to bring a complex
summary of properties of natural ester fluids from the point of view of
electrical insulation fluid for high voltage power transformers. Although many
papers have been published in this area, this study try to address some less known problems which however plays
a key role in new fluid practical applications. Some differences compared to mineral oils are discussed in study. The
critical values that might occur in the future for industrial applications are
proposed, evaluated and discussed.

Keywords

Natural esters, insulating liquid, power transformer, mineral oils

References

• 1) Perkasa, C.Y., Lelekakis, N., Czaszejko, T., Wijaya, J., Martin, D., “A comparison of the formation of bubbles and water droplets in vegetable and mineral oil impregnated transformer paper”, IEEE Transactions on Dielectrics and Electrical Insulation, 21(5): 2111-2118, (2014). 2) Pamuk, N., “Investigation of the usage of palm oils with the aim of insulation in high voltage power system equipments”, Technical Gazette, 22(5): 1287-1296, (2015). 3) Tenbohlen, S., Koch, M., “Aging performance and moisture solubility of vegetable oils for power transformers”, IEEE Transactions on Power Delivery, 25(2): 825-830, (2010). 4) Ruijin, L., Jian, H., Chen, G., Zhiqin, M., Lijun, Y., “A comparative study of physicochemical, dielectric and thermal properties of pressboard insulation impregnated with natural ester and mineral oil”, IEEE Transactions on Dielectrics and Electrical Insulation, 18(5): 1626-1637, (2011). 5) Lelekakis, N., Martin, D., Wijaya, J., “Ageing rate of paper insulation used in power transformers part 1: oil / paper system with low oxygen concentration”, IEEE Transactions on Dielectrics and Electrical Insulation, 19(1): 1999-2008, (2012). 6) Lundgaard, L.E., Hansen, W., Linhjell, D., Painter, T.J., “Aging of oil-impregnated paper in power transformers”, IEEE Transactions on Power Delivery, 19(1): 230-239, (2004). 7) Sander, A., Kardum, J.P., “Pentaerythritol crystallization - influence of the process conditions on the granulometric properties of crystals”, Advanced Powder Technology, 23(2): 191-198, (2012). 8) Pamuk, N., “Investigation of the long term degradation of cellulosic insulating materials in high voltage power transformer”, Journal of Optoelectronics and Advanced Materials, 16(3-4): 422-428, (2014). 9) Griffin, P., Lewand, L., Heywood, R., Lapworth, J., “Gassing characteristics of transformer oils at modest temperatures part 1: transformer experiences”, Doble Conference, Boston, USA, 43-51, (2004). 10) IEC 60422/2013 International Standard, “Mineral Insulating Oils in Electrical Equipment - Supervision and Maintenance Guidance”, International Electrotechnical Commission, (2013). 11) Oommen, T.V., Prevost, T.A., “Cellulose insulation in oil-filled power transformers: part II: maintaining insulation integrity and life”, IEEE Electrical Insulation Magazine, 22(1): 5-14, (2006). 12) IEC 1203/1905 International Standard, “Synthetic Organic Esters for Electrical Purposes - Guide for Maintenance of Transformer Esters in Equipment”, International Electrotechnical Commission, (2013). 13) Janes, A., Lust, E., “Organic carbonate - organic ester - based non-aqueous electrolytes for electrical double layer capacitors”, Electrochemistry Communications, 7(5): 510-514, (2005). 14) IEC 61099/2010 International Standard, “Insulating Liquids - Specifications for Unused Synthetic Organic Esters for Electrical Purposes”, International Electrotechnical Commission, (2010). 15) Adejumobi, I.A., Oyagbirin, S.G., “Insulation deterioration and its effects on power systems”, Journal Engineering and Applied Sciences, 2(5): 870-873, (2007). 16) Gallagher, T.J., “Simple dielectric liquids - mobility, conduction and breakdown”, Clarendon Press, Oxford, 59-63, (1975). 17) Gernandt, R., Wagberg, L., Gardlund, L., Dautzenberg, H., “Polyelectrolyte complexes for surface modification of wood fibres part-I: preparation and characterization of complexes for dry and wet strength improvement of paper”, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 213(1): 15-25, (2003). 18) Pamuk, N., “Statistical analysis of electrical and mechanical breakdown stress for insulation performance in high voltage power transformer”, Technical Gazette, 21(3): 495-503, (2014). 19) Radakovic, Z.R., Sorgic, M.S., “Basics of detailed thermal-hydraulic model for thermal design of oil power transformers”, IEEE Transactions on Power Delivery, 25(2): 790-802, (2010). 20) Pamuk, N., “Investigation of destructive and healing effects on the temperature and moisture rise in terms of dielectric strength of transformer insulation oil”, International Journal of Scientific and Technological Research, 1(10): 20-31, (2015). 21) Han, S., Li, Q., Li, C., Yan, J., “Electrical and mechanical properties of the oil-paper insulation under stress of the hot spot temperature”, IEEE Transactions on Dielectrics and Electrical Insulation, 21(1): 179-185, (2014).